JLB
Juanlb Developer / DevOps / Systems
personal site / notes / routes

Building systems,
documenting what matters.

I work on backend systems, infrastructure, and software that needs to hold up in the real world. This site is a place for technical notes, ongoing work, and a map of mountain routes worth remembering.

status: building
location: Spain
focus: ruby / docker / aws / agentic ai

I'm a developer with a strong backend and DevOps background. I like systems that are robust, maintainable, and understandable.

Here I write about architecture, infrastructure, trade-offs, background processing, API integrations, and sometimes about climbing, ferratas, and places I want to keep on a map.

Notes

Technical writing, implementation notes, and things learned in practice.
Putting Rails on AWS Lambda, end to end
2026-04 · rails · aws-lambda · serverless · ruby · docker · postgresql · neon · devops

A walkthrough of running a Rails app on AWS Lambda with Lamby — two functions, one Docker image, and a scale-to-zero Postgres on Neon.

read all notes →

Adventure Map

A simple map of ferratas and routes, each one with a small memory attached.
A preview — open the full map for photos, dates, and filtering.
open the full map →

Now

What I'm currently working on or thinking about.
  • Learning Terragrunt
  • Setting this up with Ralph Loops XD
last updated: 2026-05-01
see the full now page →